We are still in the infancy of ironing it all out. And if we are being real trans people (the ones that look like women) been in women spaces long before it started blowing up in the news.
The issue really comes down to the ones that still look like men going into women spaces. I'm of the mind that if you aren't doing the surgery then you got to stay out.
I don't care if they do or do not look like natural women. If they are males, they should not be competing against females in sports. They should not be running around in female only locker rooms. They can claim whatever they want, but their right to claim anything should not infringe female rights. So if females realize one is in their midst who got away with it for awhile, then they should have the right to have it removed from their midst.
I will even go as far to say that really, we should be seeking to treat mental illness, not encourage it. Seems that boat has sailed though, so let'em be is fine as long as they also understand that they do not belong in female only spaces.